From the SF Bay Guardian's annual Free Issue.

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get sweaty by donning your blades or old-school roller skates and join the Midnight Rollers' weekly Friday Night Skate. A large group of skaters embark from the Ferry Plaza on a 10-mile dance party/skate tour of the city, which includes plenty of stops for ice cream, Frisbee-throwing, and a chance for slowpokes to catch up…

Macy's Union Square puts on free monthly cooking demonstrations in the Cellar, where top local chefs reveal their secrets for dishing up creative yet healthy meals. Not only do you get to learn skills like how to barbecue like a grill master, expertly pair chocolate and wine, or make a brunch worth waking up early for, you also get to sample the yummy delights the experts have cooked up. It's like watching your favorite cooking show on the Food Network, but getting to magically reach inside the TV to grab a taste.